<template>
    <div class="home-category" @mouseleave="categoryID = null">
        <ul class="menu">
            <!-- 根据当前选择的id来让高亮状态持续 -->
            <li :class="{ active: item.id && categoryID === item.id }" v-for="item in menuList" :key="item.id" @mouseenter="categoryID = item.id">
                <RouterLink :to="`/category/${item.id}`">{{ item.name }}</RouterLink>
                <template v-if="item.children">
                    <RouterLink :to="`/category/sub/${sub.id}`" v-for="sub in item.children" :key="sub.id">{{ sub.name }}</RouterLink>
                </template>
                <template v-else>
                    <XtxSkeleton width="60px" height="18px" style="margin-right: 5px" bg="rgba(255,255,255,0.2)" />
                    <XtxSkeleton width="50px" height="18px" bg="rgba(255,255,255,0.2)" />
                </template>
            </li>
        </ul>
        <!-- 弹层 -->
        <div class="layer">
            <h4>{{ currentCat && currentCat.goods ? "分类" : "品牌" }}推荐 <small>根据您的购买或浏览记录推荐</small></h4>
            <ul v-if="currentCat && currentCat.goods && currentCat.goods.length">
                <li v-for="item in currentCat.goods" :key="item.id">
                    <RouterLink :to="`/product/${item.id}`">
                        <img :src="item.picture" alt="" />
                        <div class="info">
                            <p class="name ellipsis-2">{{ item.name }}</p>
                            <p class="desc ellipsis">{{ item.desc }}</p>
                            <p class="price"><i>¥</i>{{ item.price }}</p>
                        </div>
                    </RouterLink>
                </li>
            </ul>
            <!-- 品牌 -->
            <ul v-if="currentCat && currentCat.brands">
                <li class="brand" v-for="brand in currentCat.brands" :key="brand.id">
                    <RouterLink to="/">
                        <img :src="brand.picture" alt="" />
                        <div class="info">
                            <p class="place"><i class="iconfont icon-dingwei"></i>{{ brand.name }}</p>
                            <p class="name ellipsis">{{ brand.nameEn }}</p>
                            <p class="desc ellipsis-2">{{ brand.desc }}</p>
                        </div>
                    </RouterLink>
                </li>
            </ul>
        </div>
    </div>
</template>

<script>
import { ref, reactive, computed } from "vue";
import { useStore } from "vuex";
import { findBrand } from "@/api/home";
export default {
    name: "HomeCategory",
    setup() {
        const store = useStore();
        // 默认一级分类不足我们需要自己手动添加一个品牌分类
        const brand = reactive({
            id: "brand",
            name: "品牌",
            children: [{ id: "brand-children", name: "品牌推荐" }],
        });
        const menuList = computed(() => {
            // 将一级分类里面的二级分类只保存2个
            const list = store.state.category.categoryList.map((item) => ({ ...item, children: item.children && item.children.slice(0, 2) }));
            list.push(brand);
            return list;
        });
        // 获取选中的分类id
        const categoryID = ref(null);
        // 根据id查询到对应的分类
        const currentCat = computed(() => {
            return menuList.value.find((item) => item.id === categoryID.value);
        });
        // 将获取到的品牌数据存储到对象中
        findBrand().then((value) => {
            brand.brands = value.result;
        });

        return { menuList, categoryID, currentCat, brand };
    },
};
</script>

<style scoped lang="less">
.home-category {
    width: 250px;
    height: 500px;
    background: rgba(0, 0, 0, 0.8);
    position: relative;
    z-index: 99;
    .menu {
        li {
            padding-left: 40px;
            height: 50px;
            line-height: 50px;
            &:hover,
            &.active {
                background: @xtxColor;
            }
            a {
                margin-right: 4px;
                color: #fff;
                &:first-child {
                    font-size: 16px;
                }
            }
        }
        li.brand {
            height: 180px;
            a {
                align-items: flex-start;
                img {
                    width: 120px;
                    height: 160px;
                }
                .info {
                    p {
                        margin-top: 8px;
                    }
                    .place {
                        color: #999;
                    }
                }
            }
        }
    }
    .layer {
        width: 990px;
        height: 500px;
        background: rgba(255, 255, 255, 0.8);
        position: absolute;
        left: 250px;
        top: 0;
        display: none;
        padding: 0 15px;
        h4 {
            font-size: 20px;
            font-weight: normal;
            line-height: 80px;
            small {
                font-size: 16px;
                color: #666;
            }
        }
        // 品牌
        ul {
            display: flex;
            flex-wrap: wrap;
            li {
                width: 310px;
                height: 120px;
                margin-right: 15px;
                margin-bottom: 15px;
                border: 1px solid #eee;
                border-radius: 4px;
                background: #fff;
                &:nth-child(3n) {
                    margin-right: 0;
                }
                a {
                    display: flex;
                    width: 100%;
                    height: 100%;
                    align-items: center;
                    padding: 10px;
                    &:hover {
                        background: #e3f9f4;
                    }
                    img {
                        width: 95px;
                        height: 95px;
                    }
                    .info {
                        padding-left: 10px;
                        line-height: 24px;
                        width: 190px;
                        .name {
                            font-size: 16px;
                            color: #666;
                        }
                        .desc {
                            color: #999;
                        }
                        .price {
                            font-size: 22px;
                            color: @priceColor;
                            i {
                                font-size: 16px;
                            }
                        }
                    }
                }
            }
        }
    }
    &:hover {
        .layer {
            display: block;
        }
    }
}
.xtx-skeleton {
    animation: fade 1s linear infinite alternate;
}
@keyframes fade {
    from {
        opacity: 0.2;
    }
    to {
        opacity: 1;
    }
}
</style>
